function showImage(src, w, h) {
       noweOkienko = null;
       if (window.screen) {
              aw = screen.availWidth;
              ah = screen.availHeight;
       } else {
              aw = 640;
              ah = 450;
       }
       if (noweOkienko==null || noweOkienko.closed) {
              ustawienia=
              "left=" + (aw-w)/2 + ","
              +"top=" + (ah-h)/2 + ","
              +"screenX=" + (aw-w)/2 + ","
              +"screenY=" + (ah-h)/2 + ","
              +"width=" + w + ","
              +"height=" + h + ","
              +"innerWidth=" + w + ","
              +"innerHeight=" + h + ","
              +"toolbar=no,"
              +"location=no,"
              +"directories=no,"
              +"status=yes,"
              +"menubar=no,"
              +"scrollbars=no,"
              +"resizable=no"
              noweOkienko = window.open("showImage.php?src="+src, 'obrazek', ustawienia);
       }
}